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Lab Reflection 12

Total questions: 7

Worksheet time: 4mins

Name
Class
Date
1.

In mice, the allele for brown fur (B) is dominant to white fur (b). A white mouse would have which genotype(s)? (Select all that apply.)

a)

BB

b)

Bb

c)

bb

2.

In mice, the allele for brown fur (B) is dominant to white fur (b). A brown mouse would have which genotype(s)? (Select all that apply.)

a)

BB

b)

Bb

c)

bb

3.

In mice, the allele for brown fur (B) is dominant to white fur (b). What is the genotype ratio of the offspring from a cross between a heterozygous brown mouse and a white mouse?

a)

1 Bb : 1 bb

b)

1 BB : 2 Bb : 1 bb

c)

100% Bb

d)

100% bb

4.

In mice, the allele for brown fur (B) is dominant to white fur (b). What is the phenotype ratio of the offspring from a cross between a two heterozygous brown mice?

a)

3 brown : 1 white

b)

1 brown : 1 white

c)

100% brown

d)

100% white

5.

In snapdragons, the allele for red petals (R) is incompletely dominant to white petals (r). What is the phenotype ratio of the offspring from a cross between two pink snapdragons?

a)

1 red : 1 white

b)

1 red : 2 pink : 1 white

c)

100% pink

d)

3 pink : 1 white

6.

In humans, red-green colorblindness is a sex-linked recessive trait. What is the genotype of a man with red-green colorblindness?

a)

XbY

b)

bb

c)

XYb

7.

In humans, red-green colorblindness is a sex-linked recessive trait. What is the probability that a red-green colorblind woman and a "normal vision" man would have a child who is red-green colorblind?

a)

50%

b)

25%

c)

100%

d)

0%

e)

75%